Thermally Conductive Sheet and Cushion Member for Battery Heat Dissipation
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Solution Overview
Problem
Conventional battery heat dissipation structures face inefficiencies due to the low thermal conduction properties of rubber sheets and uneven battery cell surfaces, leading to suboptimal heat transfer, and there is a need for lightweight heat dissipation solutions applicable to various shapes and materials.
Innovation Solution
A heat dissipation structure incorporating a thermally conductive sheet with metal, carbon, or ceramic, combined with a cushion member and a rubber sheet, designed to efficiently transfer heat from battery cells to a cooling member, regardless of surface shape or material, using a thermally conductive sheet with an O-shaped or downward-C cross-section and a cushion member partially covered by the sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber sheet is used to sandwich between battery cells and housing, then the battery cells are fixed in the housing, but the low thermal conduction property of the rubber sheet hinders efficient heat transfer from battery cells to housing
Solution Approach 1:
The patent introduces a thermally conductive sheet as an intermediary component between the battery cells and housing. This mediator has high thermal conduction properties to efficiently transfer heat from battery cells to the housing, while the rubber sheet continues to provide fixing functionality. The thermally conductive sheet acts as a bridge that resolves the conflict between mechanical fixation and thermal conduction by separating these two functions into different layers.
Solution Approach 2:
The patent employs composite material structure consisting of multiple layers: a rubber sheet for elastic fixation and a thermally conductive sheet for heat transfer. This composite approach combines the advantages of different materials - the rubber provides mechanical compliance and fixation reliability, while the thermally conductive material provides efficient heat path, achieving both fixation and thermal management requirements simultaneously.
2Temperature
If a spacer made of graphite is used instead of rubber sheet, then thermal conduction improves, but gaps are generated between battery cells and spacer due to unevenness of lower surfaces of battery cells, thereby decreasing heat transfer efficiency
Solution Approach 1:
The patent utilizes the elastic property (mechanical parameter) of the rubber sheet to adapt to surface unevenness. The rubber's elasticity allows it to deform and conform to the irregular lower surfaces of battery cells, ensuring continuous contact across the entire interface. This parameter change from rigid to elastic material enables the system to accommodate manufacturing variations while maintaining both fixation and thermal conduction functions.
3Temperature
If conventional heat dissipation methods are used for circuit boards, then heat dissipation is achieved, but making the circuit board of material excellent in heat dissipation property extremely increases the cost
Solution Approach 1:
The patent uses a thermally conductive sheet as an intermediary heat transfer medium between the heat source (battery cells or circuit board) and the heat sink (housing). This approach allows the use of conventional, cost-effective materials for the main structural components while introducing a specialized thermally conductive layer only where heat transfer is critical, significantly reducing overall system cost compared to making the entire housing or circuit board from expensive high-performance thermal materials.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances heat dissipation efficiency by utilizing thermally conductive materials and flexible cushioning, effectively managing heat transfer across diverse battery cell shapes and materials, improving thermal management in batteries and other electronic devices.
Implementation Method 1
a thermally conductive sheet containing at least one of metal, carbon, and ceramic and settable between the heat source and the cooling member
Data Source
AI summary
A heat dissipating structure for a battery is provided between a heat source and a cooling member and enables heat dissipation from the heat source by conducting heat from the heat source to the cooling member. The heat dissipating structure includes: a thermally conductive sheet containing at least one of metal, carbon, and ceramic and settable between the heat source and the cooling member; and a cushion member at least partially covered with the thermally conductive sheet.